心室容积估计的准确性。
Accuracy of ventricular volume estimation.
作者信息
Wyper D J, Pickard J D, Matheson M
出版信息
J Neurol Neurosurg Psychiatry. 1979 Apr;42(4):345-50. doi: 10.1136/jnnp.42.4.345.
Abstract
Sources of error in the estimation of ventricular volume from CAT scans are discussed and the accuracy of the measurement assessed. Two methods of calculating ventricular volume from an intraventricular injection of radioisotope are described and compared. Finally, the CAT scan and isotope methods are compared and contrasted. The error associated with a single measurement of volume by any of these techniques is between 20% and 30%. In patients with no ventricular catheter there is no choice other than to use CAT scanning, but if intraventricular injection is possible this method offers a potentially more accurate volume determination because of his higher signal-to-noise ratio.
摘要
讨论了计算机断层扫描（CAT）估算心室容积时的误差来源，并评估了测量的准确性。描述并比较了两种通过脑室内注射放射性同位素来计算心室容积的方法。最后，对CAT扫描法和同位素法进行了比较和对比。采用这些技术中的任何一种单次测量容积时，相关误差在20%至30%之间。对于没有心室导管的患者，除了使用CAT扫描别无选择，但如果可以进行脑室内注射，由于该方法具有更高的信噪比，所以有可能更准确地测定容积。
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